Kershenbaum A, Demartsev V, Gammon DE, et al. (2021) Shannon entropy as a robust estimator of Zipf's Law in animal vocal communication repertoires. Methods in Ecology and Evolution 12: 553–564. https://doi.org/10.1111/2041-210X.13536
In the paper by Kershenbaum et al. (2021), the following references, cited in Figure 3, were missing from the reference list.
Bohn, K. M., Schmidt-French, B., Schwartz, C., Smotherman, M., & Pollak, G. D. (2009). Versatility and stereotypy of free-tailed bat songs. PLoS One, 4(8), e6746.
Crance, J. L., Bowles, A. E., & Garver, A. (2014). Evidence for vocal learning in juvenile male killer whales, Orcinus orca, from an adventitious cross-socializing experiment. Journal of Experimental Biology, 217(8), 1229–1237.
Freeberg, T. M. (2008). Complexity in the chick-a-dee call of Carolina chickadees (Poecile carolinensis): Associations of context and signaler behavior to call structure. The Auk, 125(4), 896–907.
Gammon, D. E. (2014). Seasonal patterns of vocal mimicry in northern mockingbirds Mimus polyglottos. Journal of Avian Biology, 45(6), 545–550.
Jin, D. Z., & Kozhevnikov, A. A. (2011). A compact statistical model of the song syntax in Bengalese finch. PLoS Computational Biology, 7(3), e1001108.
Lameira, A. R., de Vries, H., Hardus, M. E., Hall, C. P., Mitra-Setia, T., Spruijt, B. M., Kershenbaum, A., Sterck, E. H. M., van Noordwijk, M. A., van Schaik, C. P., & Wich, S. A. (2013). Predator guild does not influence orangutan alarm call rates and combinations. Behavioral Ecology and Sociobiology, 67(3), 519–528.
Sasahara, K., Cody, M. L., Cohen, D., & Taylor, C. E. (2012). Structural design principles of complex bird songs: a network-based approach. PLoS One 7(9): e44436.
Schraft, H. A., Medina, O. J., McClure, J., Pereira, D. A., & Logue, D. M. (2017). Within-day improvement in a behavioural display: Wild birds ‘warm up’. Animal Behaviour, 124, 167–174.
We apologize for this error.
Araya-Salas, M., Grabarczyk, E. E., Quiroz-Oliva, M., García-Rodríguez, A., & Rico-Guevara, A. (2025). Quantifying degradation in animal acoustic signals with the R package baRulho. Methods in Ecology and Evolution, 16, 456–467. https://doi.org/10.1111/2041-210X.14481.
In the paper by Araya-Salas et al. (2025), there were some errors in the code in the section 2.1.2.
In the section, # get degradation measures each one in a line of code
degrad_df <- tail_to_signal_ratio(degrad_tests, mar = 0.1) margin to measure tail
should have read
degrad_df <- tail_to_signal_ratio(degrad_df, mar = 0.1) #margin to measure tail
In the section # add transect column
test_data$transect <- paste(sapply(strsplit(test_data$sound.files, ””),
as“[[“, 1), sapply(strsplit(test_data$sound.files, ””), ”[[“, 3))
should have read
test_data$transect <- paste(sapply(strsplit(test_data$sound.files, ””),
“[[“, 1), sapply(strsplit(test_data$sound.files, ”_”), ”[[“, 3))
We apologise for the errors.
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